API

• public static Object newInstance(Class<?> componentType, int length)获取一个数组

  int[] num = (int[]) Array.newInstance(int.class, 10);
  

• 获取泛型数组

private <T> T[] toArray(Class<T> cls, int length){
    return (T[]) Array.newInstance(cls.getComponentType(), length);
}